160 Polygoneae. 



ciniis calycinis oppositae, ciim staminihns altcrnantcs. 

 Stamina calyce breviora, deflorata lonjjiora. Acheninm 

 subrotundo-ellipticum, basi styli mucronatum, lenticulari- 

 compressiusculum, marg^ine obtnsang-ulum, laeviusculum, 

 castaneo-fuscuni, nitidum, calyce dimidio brevius. (Descript. 

 juxta var. «.) 



3. PolygonumPersicariaI//w«.*S'/)ec.518(ea:c^./5.). Smith. 



Brif. IA24. Engl.BoU.7b6. Flor.Dan.t.l 02. Schkuhr, 



Handb. 1. 1. 108. Hayne, Arzneigew. 5. t. 22. Mert. et 



Koch. Germ. 3. 55. Beichenh. Ic. 5./. 684. Meisn. 



Monogr. 68. 



Caule ramoso, procumbente, adsccndente vel crecto; 

 foliis breviter petiolatis, laneeolatis, acutatis, utrinquo 

 glabris, margine ciliolato-scabris, interdum subtus vel 

 utrinque lanato - pubescentibus; raeemis spicaeformibus, 

 densis, cylindraceo -oblongis, axillaribus et terminalibus; 

 floribus sub-6-andris, subdigynis; acheniis lenticularibus, 

 rarius Irig^onis. 



P. rivulare Roth. Enum. 2. 185. 



P. biforme Wahlenb. Suec. 242. 



P, incanum Willd. Spec. 2. 446. 



P. lapathifolium Linn. Spec. 517. Ait. Kew. 2. 30. 

 Smith. Brit. 1. 425. Engl. Bot. t. 1382. Mert. et Koch. 

 Germ. 3. 52 Reichenb. Ic. 5./. 688. 



P. nodosum Pers. Synops. 440. Reichenb. Ic. 5. /. 689. 



P. turg^idum Thuill. Paris. I. 190. 



In locis humidis, cultis et incultis, agris et 

 ruderatis, ad vias, circa fimeta ubique copiosis- 

 sime. Floret aestate. 



Variat floribus roseis et albis, foliis maculatis et ema- 

 culatis, ochreis glabris, sublanato-pubescentibus et hir- 

 sutis, majjis minusve cilialis. In fornia albiflora (P. lapa- 

 thifolio auct) calyces, pedunculi et folia subtus plerum- 

 que grauulis minutissimis resiaosis flavidis (ut in Betula) 

 obsita. 



